Levels of organization – from cell to organism

Integrated ScienceCells & OrganismsAges 11–12

Drag the zoom slider (or click each level) to move from cell → tissue → organ → organ system → organism in humans (cardiac muscle cell → cardiac muscle tissue → heart → circulatory system → body) and in a plant (mesophyll cell → mesophyll tissue → leaf → shoot system → whole plant). Each level shows a smoothly transitioning illustration with its name and role, and autoplay steps through the whole sequence.